Ventilating apparatus.



M. W. GRISWOLD.

VENTILATING APPARATUS.

APPLIGATION FILED JUNE 14, 1912.

Patented Deo. 3, 1912.

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MERRITT W. GRISWOLD, OF HIGHWOOD, NEW JERSEY.

VENTILATING APPARATUS.

Specification of Letters Patent.

Patented Dec. 3,1912.

Application filed J' une 14, 1912. Serial No. 703,646.

'['o all whom 'Lt may concern.-

Be it known that I, MERRITT 7. GRIS- woLD, a citizen of the United States, residing at IIighwood, in the county of Bergen and State of New Jersey, have invented a certain new and useful Improvement in Ventilating Apparatus, of which the following is a specification.

The invention relates to means for removing vitiated air from rooms and apartments, and the object of the invention is to provide simple, automatically-operatedv means for removing the warm or light air in the upper portion of the room and utilizing the current thus produced, through the medium of a simple form of ejector, in drawing the heavy, vitiated cold air from the lower portion of such room, thus e'ecting the desired ventilation and also equalizing the temperature in the room.

The invention consists in certain novel features of construction and arrangement by which the above objects are attained, to be hereinafter described and pointed out in the claims.

The accompanying drawings form a part of this specification and show an apparatus by which the invention may be carried out successfully. y

Figure l is a View of a portion of the interior wall of a room, showing the apparatus in front elevation with certain portions broken away, and other portions in vertical sect-ion, and Fig. 2 is a vertical section taken on the line 2 2 in Fig. l, and partly in elevation. Fig. 3 is a front elevation of the ejector, partly in vertical section and on a. larger scale than the preceding figures, and Fig. 4c is a corresponding vertical section taken on the line i-4L in Fig. 3.

Similar letters of reference indicate the same parts in all the figures.

A is a pipe or ue of sheet metal received in a recess b provided in the wall B and concealed by a covering of lath and plaster or other finishing material as at B1. It extends from the floor C nearly to the level of the ceiling C1 and has a branch A:l at the lower end opening into the room through a grating or register A2, and at the upper end is received in a casing D in an enlarged portion of the recess.

From the upper end of the casing extends a pipe or flue E similar to the pipe A and forming a continuation of the same, leading to a flue, not shown, or to the exterior of the building in any suitable manner. The casing has an opening near the ceiling communicating with the interior of the room and protected by a grating or register D1 and carries in its interior a plurality of inverted funnels F, one above the other, supported by strips El extending from the pipe A to the pipe E, and serving as an ejector. The skirt of the lowermost funnel overhangs and partially incloses the open upper end of the pipe A and is itself similarly inclosed by the succeeding funnel.

I'Varm air near the ceiling enters the casing D through the opening D1 and escapes to the pipe E through the spaces between the funnels, the current thus established serving to induce an upward current in the pipe A thus drawing in the cooler or heavier air near the floor through the opening at A2 and forcing it into the pipe E mingled with the warm air from the upper part of the room. T hus the vitiat-ed warm air near the ceiling is carried away, and with it the cool heavy air near the ioor, laden with carbonic acid gas and other heavy impurities, and by drawing simultaneously upon both the warmest and coolest layers of air an equalization of temperature throughout the height of the room is effected.

The apparatus operates automatically and may be easily installed. As shown in the drawings it is concealed in the wall, but it will be understood that in factories and other situations in which exposure is not objectionable, the apparatus may stand wholly exposed in the room, with or without the casing D I claim 'z l. In an apparatus of the character described, a flue extending from the floor nearly to the ceiling and having its upper end open, a pipe leading from said open end, said pipe having a lateral opening at its lower end near the floor, a casing surrounding the said pipe near the ceiling and having a lateral opening and a plurality of inverted funnels spaced apart and supported upon said pipe wit-hin the casing.

2. A Ventilating pipeextending from the floor nearly to the ceiling and having an opening near the floor, a plurality of inverted funnels one within the other supported above the open upper end of said above set forth I aHiX my signature, in presplpe, a easing surrounding the upper end of ence of two Witnesses.

Said pipe and said funnels L Hue leadingJV j from the upper end of the, casing', and iii MEIWRITT XV' GRLCWVOLD' outlet from said casing' into the room below Witnesses:

said tunnels. i CHARLES R. SEARLE,

In testimony that I claim the invention l Colm M. FREDERIGKS.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

